Cooler



FIG. 1 is a front, right perspective view of a cooler showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a front, right perspective view.

The uneven-length broken lines represent unclaimed boundaries of the claimed design. The even-length broken lines showing the remainder of the cooler are for environmental purposes only and form no part of the claimed design. 

The ornamental design for a cooler, as shown and described. 